SKU: SENS-3527
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Generic KSD9700/BK05-BB1D Metallic Shell Temperature Control Switch (105°C NC) - 10A 250V

₹55.00 (Inclusive of all taxes)
Out of Stock

The KSD9700/BK05-BB1D is a metallic-shell, snap-action thermal switch designed to protect electrical circuits and equipment from overheating by opening at a preset temperature of 105°C. This normally-closed (NC) device is rated for 10A at 250V AC/DC, making it suitable for integration into appliances, power supplies, and industrial controls.

Features

  • Metallic shell construction for robust thermal conduction and durability.
  • Normally closed (NC) contact opens at a calibrated 105°C (±5°C) set point.
  • High current rating of 10A at 250V AC/DC for direct circuit protection.
  • Compact design with integrated 7cm lead wires for simplified installation.
  • Bimetallic snap-action mechanism ensures reliable, repeatable switching.

Out of stock

Description

The KSD9700/BK05-BB1D is a bimetallic disc-type thermal protector housed in a metallic shell for optimal heat transfer and mechanical strength. Its operation is based on the differential expansion of two bonded metals, which causes a snap-action to abruptly open the electrical contacts when the calibrated temperature threshold of 105°C is reached, thereby cutting power to the protected circuit or device.

This switch is designed for direct series connection in the power line, offering a cost-effective and self-contained over-temperature protection solution without requiring external power or signal conditioning. The metallic housing ensures a fast thermal response and is suitable for applications where the switch needs to be mounted directly on a heat sink or hot surface.

Key Features

  • Metallic housing provides excellent thermal conductivity and physical durability.
  • Precision bimetallic snap-action mechanism for accurate, repeatable tripping.
  • High-breaking capacity contacts rated for 10A resistive load at 250V.
  • Normally Closed (NC) configuration, opening on temperature rise for fail-safe protection.
  • Factory pre-set trip temperature of 105°C with a typical tolerance of ±5°C.
  • Compact form factor with pre-attached 7cm insulated lead wires for easy wiring.
  • Designed for automatic reset upon cooling below the reset temperature.
  • Optimized performance-to-cost ratio for mass-produced electrical appliances.

Applications

  • Over-temperature protection in power supplies, battery chargers, and transformers.
  • Thermal cutoff safety device in small household appliances (e.g., coffee makers, rice cookers).
  • Motor and pump protection in HVAC equipment and industrial machinery.
  • Heating element control and safety in soldering irons and industrial heaters.
  • Embedded thermal protection for power tools and electronic enclosures.

Technical Specifications

Model NumberKSD9700/BK05-BB1D
Contact ConfigurationNormally Closed (NC)
Trip Temperature105°C
Rated Current10A
Rated Voltage250V AC/DC
Cable Length7 cm
Head Dimensions2 x 0.8 x 0.2 mm (Terminal)
Operating PrincipleBimetallic Snap-Action
Housing MaterialMetallic Shell

Frequently Asked Questions

What is the trip temperature and reset behavior of this thermal switch?

The KSD9700/BK05-BB1D is factory-set to trip (open the circuit) at 105°C with a typical tolerance of ±5°C. It is an automatic reset type, meaning the contacts will re-close and restore the circuit once the temperature cools down below the reset point, which is typically 10-20°C lower than the trip temperature.

How should I wire this normally closed (NC) thermal switch into my circuit?

This switch is wired in series with the load (e.g., a heating element or motor) on the live (hot) wire. In its normal state (below 105°C), the circuit is closed and power flows. When the temperature at the switch's metallic shell reaches the trip point, the internal bimetallic disc snaps and opens the circuit, interrupting power to the load for protection.

What is the maximum electrical load this switch can handle?

The switch contacts are rated for a maximum of 10 Amperes at 250 Volts AC or DC, suitable for resistive loads. For inductive loads (like motors), derating may be necessary. Ensure the switch is mounted in good thermal contact with the component being monitored for accurate temperature sensing and reliable operation.

Package Includes

  • 1 x KSD9700/BK05-BB1D Metallic Shell Temperature Control Switch (105°C NC)

Additional Information

Weight 0.03 kg
Dimensions 9 × 7 × 1 cm